Finding the Fourth Proportional to 35.42, 48.86 and 31.09
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Solution
The fourth proportional to 35.42, 48.86 and 31.09 is: 42.89
Step by Step Solution
- Step 1: Write the proportion equation
35.42 : 48.86 = 31.09 : x - Step 2: Convert to fraction form
35.42/48.86 = 31.09/x - Step 3: Cross multiply
35.42x = 48.86 × 31.09 - Step 4: Simplify right side
35.42x = 1,519.06 - Step 5: Solve for x
x = 1,519.06/35.42 - Step 6: Final answer
x = 42.89
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.